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Accumulated Other Comprehensive Loss | 12 Months Ended
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Sep. 30, 2021
Accumulated Other Comprehensive Loss |
Accumulated Other Comprehensive Loss | 5. Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Effect of |  | ​ | ​ |  | Accumulated
​ | ​ | Foreign | ​ | Minimum | ​ | Other
​ | ​ | Currency | ​ | Pension | ​ | Comprehensive
​ | ​ | Translation | ​ | Liability | ​ | Loss
​ | ​ | (Amounts in thousands)
Balance as of September 30, 2019 | ​ | $ | (5,111) | ​ | $ | (7,482) | ​ | $ | (12,593)
Change in period | ​ |  | 415 | ​ |  | 150 | ​ |  | 565
Tax effect of change in period | ​ |  | — | ​ |  | 33 | ​ |  | 33
Balance as of September 30, 2020 | ​ | $ | (4,696) | ​ | $ | (7,299) | ​ | $ | (11,995)
Change in period | ​ |  | 646 | ​ |  | 1,972 | ​ |  | 2,618
Tax effect of change in period | ​ |  | — | ​ |  | (71) | ​ |  | (71)
Balance as of September 30, 2021 | ​ | $ | (4,050) | ​ | $ | (5,398) | ​ | $ | (9,448)
​ The changes in the minimum pension liability are net of amortization of net loss of $235 thousand in 2021 and net loss of $102 thousand in 2020 included in net periodic pension cost.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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